Current-induced dynamics of composite free layer with antiferromagnetic interlayer exchange coupling

Details Current-induced dynamics of composite free layer with antiferromagnetic interlayer exchange coupling Current-induced dynamics of composite free layer with antiferromagnetic interlayer exchange coupling

2011-02-04

arxiv.org/abs/1102.1028v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 7 figures

Scientific paper

Current-induced dynamics in spin valves including composite free layer with antiferromagnetic interlayer exchange coupling is studied theoretically within the diffusive transport regime. We show that current-induced dynamics of a synthetic antiferromagnet is significantly different from dynamics of a synthetic ferrimagnet. From macrospin simulations we obtain conditions for switching the composite free layer, as well as for appearance of various self-sustained dynamical modes. Numerical simulations are compared with simple analytical models of critical current based on linearized Landau-Lifshitz-Gilbert equation.

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